Dust-guard.



No. 810,039. v PATENTED JAN. 16,1906.

E. DBNEGRB.

DUST GUARD.

APPLICATION FILED JULYB. '1905.

2 SHEETS-SHEET 1.

M A A- mmwfd# No. 810,039. I PATBNTBD JAN.16, 1906.`

E. DENEGRB. v

v DUST GUARD.

APrLIoA'rIoN FILED .T ULYe. 190s.

2 SHEETS--BHBET 2.

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UNITED STATES PATENT orrrcn.

DUST-GUARD.

Specification of Letters Patent.

Patented Jan. 16, 1906 Application filed July 6, 1905. Serial No. 268,335.

To all zoll/0177, it Duty concern:

Be it known that I, EDWARD DENEGRE, a citizen of the United States, residing at Ohicago, in the county of Cook and State of Illinois, have invented certain new and useful Innprovements in Dust-G uards; and I do hereby declare the following to be a full, clear, and exact description ofthe invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide an improved dust-guard for car-axle boxes; and to this end the invention consists of the novel devices and combination of devices hereinafter described, and defined in the claims.

The invention is illustrated in the accompanying drawings, wherein like characters indicate like parts throughout the several views.

In the drawings, Figure lis a View, chiefly in longitudinal section, but with some parts shown in elevation,some portions being broken away and some parts being removed, illustrating my improved dust-guard in working position. Fig. 2 is a transverse vertical section taken on the line :r2 x2 of Fig. l. Fig. 3 is a detail view,partly in plan and partly in horizontal section, on the line m3 :r3 of Fig. 1, some parts being broken away. Fig. 4 is atransverse vertical section taken on the line m4 of Fig. 3. Fig. 5 is a vertical section taken on the line x5 of Fig. 3 and showing the parts of the dustguard separated from each other and from the box, the axle being removed and some parts being broken away; and Fig. 6 is a detail in elevation showing the coiled compressionspring and a cooperating sectional packingring.

The reference-letters a, c, and c2 indicate the axle, a denoting the body portion, and c2 the journal, and c the intermediate part, subject to the dust-guard.

The box o may be of the usual or any suitable construction, and it is provided with a raised boss o, surrounding the rear end opening of the axle-passage of the box and having a machined or planed face serving as a jointsurface to be packed. The box b is also provided with the box-Hanges b2 at the sides of its rear end.

The reference-letters 3 and of indicate, respectively, the brass and the key applied in the usual way.

The guard-plate is composed of the integral body portion c and the hoop-like lateral extensions or ear-lugs c', which are adapted to engage with the lock-flanges b2 of the box, as

vertical 'plane with an annular fiange 23. the

outer face of which is machined or planed, so that it will fit and form a closely-packed joint with the machined face of the axle-box boss 7). Between the inwardly-projecting end of the hub portion Z2 and the flange Z3 said sectional packing-ring is formed with a beveled or conical surface di, that serves as a seat for one end of a spiral helical spring' c.

I/Vhen the parts are put together in working position, the sectional packing-ring is interposed between the guard-plate c and the box and directly engages and forms closelypacked joints both with the axle and with the box. The spiral helical spring e is interposed between the packing-ring and the guard-plate, with its smaller end directly bearing against the beveled or conical surface CZ* of the said packing-ring. The said spring is of course thus applied under compression, so that it acts with an end thrust to force the packing-ring against the box and acts upon the beveled or conical surface d4 of the packing-ring to force the sections of said packing-ring tightly onto the axle. Otherwise stated, when the hooklike ear-lugs c of the guard-plates c are engaged with the lock-flanges b2 of the box the springawill be compressed between the guardplate and the packing-ring and will serve yieldingly to clamp the dust-guard to the box and to hold the packing-ring in proper packing position both in respect to the box-surface and to the axle-surface to be packed thereby. The spring will therefore take up all of the wear both between the packing-ring and the axle-box and between the packing-ring and the axle and will always insure tight joints between the said parts. The coil at the smaller end of the spring is of such size that it would natu rally engage with that portion of the beveled or conical surface d* Aof the sectional packing-ring which is of the smallest diameter. Under extreme endwise compression of the spring the said coil at the smaller end there- IOO IIO

of may be caused to expand slightly on the said conical surface alf, and as the axle-engaging surface of the packing-ring Wears away the sections of said packing-ring will be gradually moved inward under the camming or inwardly-crowding action of the spring on the said surface (Z4. With this disposition of the spiral helical spring the maximum force thereof will be always rendered available to force the sections of the packing-ring onto the axle. The said sectional packing-ring is preferably composed of gray iron, as practice has demonstrated that to be the best metal; but it may, ofcourse, be composed of any other suitable material. It is of course of the highest irnportance that the sections of the sectional packing-ring be loosely connected, so that they are capable of being easily and freely moved onto the axle .by the camming action of the spring on the beveled or conical surface thereof. In addition to the two important functions performed by the spring e, as above fully set forth, the said spring performs a third function-to wit, it frictionally clamps the dustguard to the box, the tension of the said spring being such that under the friction from the clamping-sections the weight of the end dustguard will be carried by the box, thereby relieving the axle from any wear and tear which would otherwise be incidental to the relation of the parts if the load thereof were to be carried by the axle. From this statement it must be obvious that the spring is free to move with the axle in respect to the box under the motions incidental to the service. Hence all of the conditions incident to the service are met, and the surfaces to be packed, both as to the box and to the axle, are'always tightly hugged directly by the sectional packing-ri ng.

What l claim, and desire to secure by Letters Patent of the United States, is as follows:

l. The combination with a journal-box, of a guard-plate having means for detachable engagement with said box, a packing-ring interposed between said guard-plate and said box and directly engaging' and packing both the axle and the box, which packing-ring is made up of a plurality of -sections and is provided with a conical spring-engaging surface, and a spiral helical spring reacting at its large end against said detachable guard-plate and with its smaller end directly engaging and reacting against the conical surface of said packingring, substantially as described.

2. rl`he combination with ajournal-box, of a guard-plate having means for detachable engagement with said box, a packing-ring interposed between said guard-plate and said box and directly engaging and packing both the axle and the box, which packing-ring is made up of a plurality of-loosely-connected sections having overlapped ends, said packing-ring having a conical spring-engaging surface, and a spiral helical spring reacting at its large end against said detachable guard-plate and with its smaller end directly engaging and reacting against the conical surface of said packing-ring, substantially as described.

In testimony whereof I afx my signature in presence of two witnesses.

' EDWARD DENEGRE.

Witnesses:

EDWARD B. FLnIseI-I, WAR. A. RANDEL. 

